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 #include &lt;QtGui&gt;

 #include &quot;window.h&quot;

 Window::Window(QWidget *parent)
     : QDialog(parent)
 {
     browseButton = createButton(tr(&quot;&amp;Browse...&quot;), SLOT(browse()));
     findButton = createButton(tr(&quot;&amp;Find&quot;), SLOT(find()));

     fileComboBox = createComboBox(tr(&quot;*&quot;));
     textComboBox = createComboBox();
     directoryComboBox = createComboBox(QDir::currentPath());

     fileLabel = new QLabel(tr(&quot;Named:&quot;));
     textLabel = new QLabel(tr(&quot;Containing text:&quot;));
     directoryLabel = new QLabel(tr(&quot;In directory:&quot;));
     filesFoundLabel = new QLabel;

     createFilesTable();

     QHBoxLayout *buttonsLayout = new QHBoxLayout;
     buttonsLayout-&gt;addStretch();
     buttonsLayout-&gt;addWidget(findButton);

     QGridLayout *mainLayout = new QGridLayout;
     mainLayout-&gt;addWidget(fileLabel, 0, 0);
     mainLayout-&gt;addWidget(fileComboBox, 0, 1, 1, 2);
     mainLayout-&gt;addWidget(textLabel, 1, 0);
     mainLayout-&gt;addWidget(textComboBox, 1, 1, 1, 2);
     mainLayout-&gt;addWidget(directoryLabel, 2, 0);
     mainLayout-&gt;addWidget(directoryComboBox, 2, 1);
     mainLayout-&gt;addWidget(browseButton, 2, 2);
     mainLayout-&gt;addWidget(filesTable, 3, 0, 1, 3);
     mainLayout-&gt;addWidget(filesFoundLabel, 4, 0);
     mainLayout-&gt;addLayout(buttonsLayout, 5, 0, 1, 3);
     setLayout(mainLayout);

     setWindowTitle(tr(&quot;Find Files&quot;));
     resize(700, 300);
 }

 void Window::browse()
 {
     QString directory = QFileDialog::getExistingDirectory(this,
                                tr(&quot;Find Files&quot;), QDir::currentPath());
     if (!directory.isEmpty()) {
         directoryComboBox-&gt;addItem(directory);
         directoryComboBox-&gt;setCurrentIndex(directoryComboBox-&gt;currentIndex() + 1);
     }
 }

 void Window::find()
 {
     filesTable-&gt;setRowCount(0);

     QString fileName = fileComboBox-&gt;currentText();
     QString text = textComboBox-&gt;currentText();
     QString path = directoryComboBox-&gt;currentText();

     QDir directory = QDir(path);
     QStringList files;
     if (fileName.isEmpty())
         fileName = &quot;*&quot;;
     files = directory.entryList(QStringList(fileName),
                                 QDir::Files | QDir::NoSymLinks);

     if (!text.isEmpty())
         files = findFiles(directory, files, text);
     showFiles(directory, files);
 }

 QStringList Window::findFiles(const QDir &amp;directory, const QStringList &amp;files,
                               const QString &amp;text)
 {
     QProgressDialog progressDialog(this);
     progressDialog.setCancelButtonText(tr(&quot;&amp;Cancel&quot;));
     progressDialog.setRange(0, files.size());
     progressDialog.setWindowTitle(tr(&quot;Find Files&quot;));

     QStringList foundFiles;

     for (int i = 0; i &lt; files.size(); ++i) {
         progressDialog.setValue(i);
         progressDialog.setLabelText(tr(&quot;Searching file number %1 of %2...&quot;)
                                     .arg(i).arg(files.size()));
         qApp-&gt;processEvents();

         if (progressDialog.wasCanceled())
             break;

         QFile file(directory.absoluteFilePath(files[i]));

         if (file.open(QIODevice::ReadOnly)) {
             QString line;
             QTextStream in(&amp;file);
             while (!in.atEnd()) {
                 if (progressDialog.wasCanceled())
                     break;
                 line = in.readLine();
                 if (line.contains(text)) {
                     foundFiles &lt;&lt; files[i];
                     break;
                 }
             }
         }
     }
     return foundFiles;
 }

 void Window::showFiles(const QDir &amp;directory, const QStringList &amp;files)
 {
     for (int i = 0; i &lt; files.size(); ++i) {
         QFile file(directory.absoluteFilePath(files[i]));
         qint64 size = QFileInfo(file).size();

         QTableWidgetItem *fileNameItem = new QTableWidgetItem(files[i]);
         fileNameItem-&gt;setFlags(Qt::ItemIsEnabled);
         QTableWidgetItem *sizeItem = new QTableWidgetItem(tr(&quot;%1 KB&quot;)
                                              .arg(int((size + 1023) / 1024)));
         sizeItem-&gt;setTextAlignment(Qt::AlignRight | Qt::AlignVCenter);
         sizeItem-&gt;setFlags(Qt::ItemIsEnabled);

         int row = filesTable-&gt;rowCount();
         filesTable-&gt;insertRow(row);
         filesTable-&gt;setItem(row, 0, fileNameItem);
         filesTable-&gt;setItem(row, 1, sizeItem);
     }
     filesFoundLabel-&gt;setText(tr(&quot;%1 file(s) found&quot;).arg(files.size()));
 }

 QPushButton *Window::createButton(const QString &amp;text, const char *member)
 {
     QPushButton *button = new QPushButton(text);
     connect(button, SIGNAL(clicked()), this, member);
     return button;
 }

 QComboBox *Window::createComboBox(const QString &amp;text)
 {
     QComboBox *comboBox = new QComboBox;
     comboBox-&gt;setEditable(true);
     comboBox-&gt;addItem(text);
     comboBox-&gt;setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred);
     return comboBox;
 }

 void Window::createFilesTable()
 {
     filesTable = new QTableWidget(0, 2);
     QStringList labels;
     labels &lt;&lt; tr(&quot;File Name&quot;) &lt;&lt; tr(&quot;Size&quot;);
     filesTable-&gt;setHorizontalHeaderLabels(labels);
     filesTable-&gt;horizontalHeader()-&gt;setResizeMode(0, QHeaderView::Stretch);
     filesTable-&gt;verticalHeader()-&gt;hide();
     filesTable-&gt;setShowGrid(false);
 }</pre>
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